Many homeowners with gas combi boilers are now looking for cleaner, greener alternatives—but replacing a combi often means installing large hot water cylinders, which take up space and demand strict maintenance. That’s where Sunamp’s Thermino thermal battery steps in.
🔧 How the Sunamp Thermino Works
At the heart of the Thermino is Plentigrade, a high-energy-density phase-change material that stores heat in a compact module—up to four times smaller than a conventional cylinder . Instead of heating and storing water, the Sonnen-style battery stores thermal energy. When you open a tap, cold water flows through the unit and gets heated on the way out—delivering mains-pressure hot water on demand .
🛡️ Built-In Legionella Safety
The Thermino holds under 15 L of water at any time, eliminating stagnant bulk storage and significantly reducing Legionella risk . Because the system stores energy—not water, there’s no need for legionella temperature cycles or annual testing. This “set‑and‑forget” approach ensures hot water safety with zero hassle .
✔️ Benefits for Former Combi Boiler Homes
- Space-saving design Without bulky cylinders, the Thermino can fit in kitchen cupboards, airing spaces, or even behind furniture—perfect for homes with limited storage .
- Energy efficiency & lower bills Vacuum insulation keeps daily heat losses to around 0.77 kWh—about half that of older cylinders—saving up to £280/year .
- Flexible energy sources Works seamlessly with existing boilers (“xPlus” version), solar panels, heat pumps, or overnight tariffs like Economy 7, making for a future-ready hybrid system .
- Minimal maintenance required With no moving parts, no water storage, and a 10-year warranty, it eliminates cylinder servicing and legionella checks .
🚀 Easy Upgrade — Big Impact
Sunamp’s Thermino is a smart, compact, and efficient solution for homes leaving combi boilers behind. It offers on-demand hot water, dramatically reduced Legionella risk, easy installation, and lower bills—without the complexity of traditional tanks. Perfect for homeowners seeking a clean, convenient, and compliant upgrade.
